Camera module

Patent metadata

Field	Value
Publication number	US-10690998-B2
Application number	US-201916273805-A
Country	US
Kind code	B2
Filing date	Feb 12, 2019
Priority date	Jul 4, 2018
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A camera module includes a housing including a lens module; a diaphragm module to form N apertures of different sizes, where N is a natural number, with blades disposed on an object side of the lens module; and a diaphragm driving unit disposed with the diaphragm module, and including a driving coil and a magnetic member disposed opposite to the driving coil, the magnetic member being movable in a direction perpendicular to an optical axis to be fixed in N positions along a movement path.

First claim

What is claimed is:

1. A camera module comprising:
a housing comprising a lens module;
a diaphragm module configured to form N apertures of different sizes, where N is a natural number, with blades disposed on an object side of the lens module; and
a diaphragm driving unit disposed with the diaphragm module, and comprising N driving coils and a magnetic member disposed opposite to the driving coils, the magnetic member configured to be movable in a direction perpendicular to an optical axis and to be fixed in N positions along a movement path.

2. The camera module according to claim 1 , wherein the magnetic member comprises a driving magnet magnetized with a permanent magnet.

3. The camera module according to claim 1 , wherein a surface of the driving magnet opposite to the N driving coils is magnetized to the N pole or S pole.

4. The camera module according to claim 3 , wherein surfaces of the N driving coils opposite to the driving magnet are magnetized to the N pole or S pole, respectively.

5. The camera module according to claim 1 , wherein N is equal to three.

6. The camera module according to claim 2 , wherein N is equal to three.

7. The camera module according to claim 6 , wherein the driving magnet comprises two driving magnets, and N is greater than or equal to two.

8. The camera module according to claim 7 , wherein the two driving magnets are magnetized such that one surface of each of the two driving magnets opposing the driving coils is magnetized to the N pole and another surface of each of the at least two driving magnets is magnetized to the S pole.

9. The camera module according to claim 8 , wherein surfaces of the driving coils opposite to the driving magnets are magnetized to the N or S pole, respectively.

10. The camera module according to claim 1 , wherein the magnetic member comprises a non-magnetized driving yoke.

11. The camera module according to claim 10 , wherein surfaces of the driving coils opposite to the driving yoke are magnetized to the N pole or S pole, respectively.

12. The camera module according to claim 10 , wherein N is equal to three.

13. The camera module according to claim 1 , wherein the diaphragm driving unit comprises stoppers disposed at end portions of the movement path to restrict movement of the magnetic member.

14. The camera module according to claim 1 , wherein the driving coils are disposed in the housing.

15. A camera module comprising:
a lens module;
blades configured to form N apertures to selectively change an amount of light incident on the lens module, where N is a natural number;
N driving coils; and
a magnetic portion disposed opposite to the N driving coils and configured to move linearly along a movement path in order to rotate the blades to form the N apertures.

16. The camera module of claim 15 , wherein the magnetic portion comprises a magnetic member opposed to the N driving coils, and the magnetic member is configured to be fixed at N positions along the movement path in order to form the N apertures.

17. The camera module of claim 15 , wherein the blades comprise a first blade and a second blade, and a portion of the first blade and a portion of the second blade overlap each other in an optical axis direction.

18. The camera module of claim 15 , further comprising a gap spacer disposed between the blades and the lens module, and comprising a through-hole smaller in size than a size of a largest aperture formed by the blades.

Assignees

• Samsung Electro Mech

Inventors

• Hong Seung Hee
• Lee Sang Jong
• Jung Min Ki
• Yoon Hee Soo
• Jang Su Bong
• Song Seung Jae

Classifications

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G03B9/04 Primary

  Single movable plate with two or more apertures of graded size, e.g. sliding plate or pivoting plate · CPC title

• G03B17/02

  Bodies · CPC title